Backlight apparatus and display apparatus including the same

Abstract

A backlight apparatus includes a substrate which includes a plurality of layers. A plurality of light emitting modules are arranged on a top layer of the plurality of layers closest to a light guide panel, and a plurality of wires penetrates through the plurality of layers to electrically connect the light emitting modules and a plurality of driving units. Accordingly, the width of the substrate of an edge type backlight apparatus which can provide local dimming is reduced. Therefore, the display apparatus using the edge type backlight apparatus can be slim even if it is designed to provide local dimming.

What is claimed is: 
     
       1. A display apparatus comprising:
 a display panel; and 
 a backlight unit which provides backlight to the display panel, 
 wherein the backlight unit comprises: 
 a plurality of light emitting modules; 
 at least one driving unit which drives the plurality of light emitting modules; 
 a substrate which comprises a plurality of layers stacked together, wherein the light emitting modules are arranged on a top layer of the plurality of layers, and a plurality of wires penetrate through the plurality of layers to electrically connect the plurality of light emitting modules and the at least one driving unit; and 
 a chassis which accommodates the light emitting modules and the substrate at an end of the display panel. 
 
     
     
       2. The display apparatus as claimed in  claim 1 , wherein the backlight unit further comprises a plurality of light emitting blocks each comprising at least one of the plurality of the light emitting modules,
 wherein at least one wire is arranged in each layer of the substrate and connected to at least one light emitting block. 
 
     
     
       3. The display apparatus as claimed in  claim 2 , wherein all of the light emitting modules included in each one of the light emitting blocks are connected to a same wire. 
     
     
       4. The display apparatus as claimed in  claim 2 , wherein a number of the layers of the substrate is equal to a number of the light emitting blocks. 
     
     
       5. The display apparatus as claimed in  claim 2 , wherein a number of the driving units is equal to a number of the light emitting blocks to respectively drive the light emitting blocks. 
     
     
       6. The display apparatus as claimed in  claim 2 , wherein the plurality of light emitting blocks are driven concurrently by one driving unit. 
     
     
       7. The display apparatus as claimed in  claim 1 , wherein the backlight unit further comprises a plurality of light emitting blocks each comprising at least one of the plurality of light emitting modules, and
 wherein a number of the light emitting blocks corresponds to a number of the driving units, and a number of the layers is less than or equal to the number of the driving units. 
 
     
     
       8. The display apparatus as claimed in  claim 1 , wherein the plurality of layers of the substrate are connected to each other through at least one via hole. 
     
     
       9. The display apparatus as claimed in  claim 5 , wherein the plurality of driving units drive the light emitting modules at different brightness levels. 
     
     
       10. The display apparatus as claimed in  claim 1 , wherein each of the plurality of light emitting modules includes at least one light emitting diode, and the light emitting modules are disposed along an edge of the chassis at the end of the display panel. 
     
     
       11. A backlight apparatus comprising:
 a plurality of light emitting modules; 
 at least one driving unit which independently drives the plurality of light emitting modules; 
 a substrate which comprises a plurality of layers stacked together, wherein the light emitting modules are arranged on a top layer of the plurality of layers, and a plurality of wires penetrate through the plurality of layers to electrically connect the plurality of light emitting modules and the at least one driving unit; and 
 a chassis which accommodates the light emitting modules and the substrate at an end of a display panel. 
 
     
     
       12. The backlight apparatus as claimed in  claim 11 , further comprising a plurality of light emitting blocks each comprising at least one of the plurality of light emitting modules,
 wherein at least one wire is arranged in each layer of the substrate and connected to at least one light emitting block. 
 
     
     
       13. The backlight apparatus as claimed in  claim 12 , wherein all of the light emitting modules included in each one of the light emitting blocks are connected to a same wire. 
     
     
       14. The backlight apparatus as claimed in  claim 12 , wherein a number of the layers of the substrate is equal to a number of the light emitting blocks. 
     
     
       15. The backlight apparatus as claimed in  claim 12 , wherein a number of the driving units is equal to a number of the light emitting blocks to respectively drive the light emitting blocks. 
     
     
       16. The backlight apparatus as claimed in  claim 12 , wherein the plurality of light emitting blocks are driven concurrently by one driving unit. 
     
     
       17. The backlight apparatus as claimed in  claim 11 , further comprising a plurality of light emitting blocks each comprising at least one of the plurality of light emitting modules,
 wherein a number of the light emitting blocks corresponds to a number of the driving units, and a number of the layers is less than or equal to the number of the driving units. 
 
     
     
       18. The backlight apparatus as claimed in  claim 11 , wherein the plurality of layers of the substrate are connected to each other through at least one via hole. 
     
     
       19. The backlight apparatus as claimed in  claim 15 , wherein the plurality of driving units drive the light emitting modules at different brightness levels. 
     
     
       20. The backlight apparatus as claimed in  claim 11 , wherein each of the plurality of light emitting modules includes at least one light emitting diode, and the light emitting modules are disposed along an edge of the chassis.